WO2016086759A1

WO2016086759A1 - Loudspeaker module

Info

Publication number: WO2016086759A1
Application number: PCT/CN2015/094266
Authority: WO
Inventors: 苗青; 许超
Original assignee: 歌尔声学股份有限公司
Priority date: 2014-12-05
Filing date: 2015-11-11
Publication date: 2016-06-09
Also published as: US20170311061A1; CN104519449A; US10231041B2

Abstract

Disclosed is a loudspeaker module which comprises a shell and a loudspeaker unit accommodated in the shell. The shell comprises a front cover, a first shell and a second shell which enclose a cavity. The loudspeaker unit is fixed in the cavity and separates the cavity into a front cavity and a rear cavity. The cavity between the loudspeaker unit and the front cover and the first shell is the front cavity. The loudspeaker unit comprises a vibrating system and a magnetic circuit system. The front cover is provided with a cavity corresponding to the mounting position of the loudspeaker unit, and the cavity is isolated from the front cavity and the rear cavity and is provided with a ventilation structure in communication with external environments. The loudspeaker module of the present invention has the advantage of good acoustic performance.

Description

Speaker module

Technical field

The utility model relates to the field of electroacoustics, in particular to a speaker module.

Background technique

With the expansion of the consumer electronics market, a large number of consumer electronic products such as mobile phones and notebook computers have been widely promoted, and the speaker module has a wide range of requirements as an important acoustic component in consumer electronic products. With the improvement of the sound quality requirements of consumer electronic products, the performance of speaker modules has attracted more and more attention.

The speaker module is an energy conversion device. The speaker module comprises a casing combined with a front cover and two casings, the casing housing a speaker unit, the speaker unit comprises a vibration system and a magnetic circuit system, and the speaker unit separates the entire module cavity into a front cavity. And the two chambers of the rear sound chamber, the front sound chamber communicates with the outside of the module through the sound hole for sound transmission; the rear sound chamber is a sealed cavity. The traditional technology of the speaker module, the structure has been relatively fixed, the acoustic performance is also similar, because the customer's performance requirements for the speaker module is getting higher and higher, the general design of the speaker module is not improved, can not meet the further improvement of the speaker module The need for acoustic performance.

Therefore, it is necessary to propose an improvement to improve the acoustic performance of the speaker module.

Utility model content

The technical problem to be solved by the present invention is to provide a speaker module with good acoustic performance.

In order to achieve the above object, the present invention adopts the following technical solution: a speaker module includes a housing and a speaker unit housed in the housing, the housing including a front cover, a first housing and a second housing The front cover, the first housing and the second housing enclose a cavity, the speaker unit is fixed in the cavity, and the speaker unit separates the cavity into a front a cavity and a rear cavity, a cavity between the speaker unit and the front cover and the first casing is a front cavity; the speaker unit includes a vibration system and a magnetic circuit system; and: the front cover Corresponding to the speaker unit mounting position is set a cavity, the cavity being isolated from the front cavity and the back cavity; the cavity being provided with a gas permeable structure in communication with the external environment.

As a preferred technical solution, the cavity volume is 0.1 cubic centimeters.

As a preferred technical solution, a coverage area of the cavity in the first housing is smaller than an area of the speaker unit vibration system.

As a preferred technical solution, the gas permeable structure is disposed on a side of the casing; and further preferably, the gas permeable structure is a gas permeable opening.

As a preferred technical solution, the front cavity is provided with an sound hole, and the sound hole communicates with the front cavity and the external environment, and the sound hole is disposed at a side of the casing.

As a further preferred aspect of the above aspect, the magnetic circuit system includes a magnetic yoke, and the second housing is provided with an opening corresponding to the position of the magnetic yoke, and the magnetic yoke extends out of the opening.

In the speaker module of the present invention, a cavity is disposed at a front cavity of the module, the cavity is separated from the front cavity and the rear cavity, and the cavity and the external environment are provided with an opening. The cavity divides the front cavity space, can effectively improve the frequency response curve of the speaker product, and adjust the high frequency performance of the speaker module. At the same time, the cavity optimizes the front cavity structure of the speaker module, effectively improving some of the front cavity. The resonance phenomenon of these frequencies enriches the sense of hearing of the speaker product and improves the high frequency THD; therefore, the speaker module of the present invention has the advantage of good acoustic performance.

Preferably, the cavity has a volume of 0.1 cubic centimeter, and the 0.1 cubic centimeter cavity separates the independent space from the front cavity space to improve the acoustic performance of the speaker module without additionally increasing the external space of the speaker module.

In order to improve the acoustic performance of the speaker module without affecting the internal space of the speaker, the area of the cavity is smaller than the area of the vibration system of the speaker unit, that is, the cross-sectional area of the cavity is smaller than the cross-sectional area of the single body, and the cavity It can be placed above the single unit, occupying only part of the space of the front cavity, and does not affect the interior of the speaker module and the space of the rear cavity.

In order to correspond to the overall appearance of the speaker module and improve the flexibility of the cavity setting, the cavity of the cavity is a front cover structure, and no additional speaker module components are added. In order to ensure the adjustment function of the acoustic performance of the cavity, the ventilation structure of the cavity and the external conduction may be disposed on the side of the speaker module.

In the speaker module of the present invention, the front cavity of the module is provided with an isolated cavity, which can improve the speaker The acoustic performance of the module, therefore, the speaker module of the present invention has the advantage of good acoustic performance.

DRAWINGS

1 is a perspective view of a specific embodiment of a speaker module of the present invention;

2 is another perspective view of the speaker module shown in FIG. 1;

Figure 3 is a cross-sectional view of the speaker module of Figure 1;

4 is an exploded perspective view of the front cover of the speaker module shown in FIG. 1.

detailed description

The content of the present invention will be described in detail below with reference to the accompanying drawings:

Example:

As shown in FIG. 1 , a speaker module according to an embodiment of the present invention includes a housing including a first housing 11 , a second housing 12 , and a front cover 2 ; the housing is provided with a speaker unit 3 , and a first housing The body 11, the second casing 12 and the front cover 2 enclose a cavity, and the speaker unit 3 is disposed in the cavity. As shown in FIG. 3, the speaker unit 3 divides the cavity into a front cavity 51 and a rear cavity 52. The speaker unit 3, the first housing 11 and the front cover 2 enclose a front cavity 51, and the front cavity 51 is provided with the outside. Connected to the sound hole for the sound of the speaker unit 3 to be emitted.

As shown in FIG. 3, in the speaker module of the present invention, the front cover 2 is provided with a cavity 4 corresponding to the position of the speaker unit 3, and the cavity 4 is separated from the front cavity 51 and the rear cavity 52, as shown in FIG. 1 and FIG. As shown in FIG. 4, the cavity 4 is provided with a venting opening 41 communicating with the outside. In this embodiment, the venting opening 41 is disposed on the side of the speaker module. In actual application, the venting opening can be other venting structures according to actual needs, and The advantages of the speaker module of the present invention can be achieved by being disposed at other locations. The speaker module of the present invention, the arrangement of the cavity 4, improves the volume and resonance of the front cavity. The cavity 4 divides the space of the front cavity 51, effectively improves the frequency response curve of the product, and adjusts the high frequency performance of the product; the cavity 4 optimizes the structure of the front cavity 51 of the speaker module, and effectively improves some of the front cavity 51. The resonance phenomenon of frequency enriches the sense of hearing of the speaker products, improves the high frequency THD, and improves the performance of the speaker module. In the speaker module of the embodiment, the sound hole of the front cavity 51 communicating with the outside is disposed on the side of the speaker module housing, and the sound hole is a gap structure between the front cover 2 and the first casing 11; In the process, the sound hole can be designed according to the design of the speaker module. If it is set in other locations, it does not affect the advantages of the speaker module of the present invention.

As shown in FIG. 3 and FIG. 4, the cavity 4 is a structure of the front cover 2. The speaker module is assembled without adding other additional components, and the speaker module assembly step is not increased.

In the actual application process, when the volume of the cavity 4 is 0.1 cubic centimeter, the acoustic performance of the cavity 4 is maximized for the speaker module, and the space is small, and the external volume of the speaker module is not additionally increased.

As shown in FIG. 3, in the speaker module of the present invention, the area of the cavity 4 is smaller than the area of the speaker unit vibration system. The area of the cavity 4 is smaller than the vibration system area of the speaker unit 3, which ensures that the cross-sectional area of the cavity 4 is smaller than the cross-sectional area of the speaker unit 3. The cavity 4 occupies only a part of the space of the front cavity 51, and does not occupy the speaker unit. The volume of 3 and the space of the back cavity 52 have an effect.

As shown in FIG. 3, in the speaker module of the embodiment, the speaker unit 3 includes a magnetic circuit system including a magnetic yoke 31, and the second housing 12 is provided with an opening corresponding to the mounting position of the speaker unit 3. The yoke 31 extends out of the opening of the second housing 12; the outer surface of the yoke 31 is flush with the outer surface of the second housing. The structural design increases the volume of the speaker unit 3, and is beneficial to improving the acoustic performance of the speaker module. Moreover, the yoke 31 extends out of the second housing 12, which is beneficial to the heat dissipation during the operation of the speaker unit 3. Avoid the defects caused by the excessive temperature of the speaker unit 3, and improve the reliability of the speaker module.

In the speaker module of the present invention, the front cover surrounding the front cavity is provided with a cavity isolated from the front cavity, the cavity divides the front cavity space, effectively improves the frequency response curve of the speaker module, and adjusts the high frequency of the speaker module. At the same time, the cavity optimizes the front cavity structure of the speaker module, effectively improves the resonance phenomenon of certain frequencies in the front cavity, enriches the hearing of the speaker module, improves the high frequency THD, and improves the acoustic performance of the speaker module. Therefore, the speaker module of the present invention has the advantage of good acoustic performance.

The above is only the embodiment of the present invention, and is not intended to limit the present invention, and equivalent modifications or variations made by those skilled in the art in light of the present invention are included in the scope of the claims.

Claims

A speaker module includes a housing and a speaker unit housed in the housing, the housing includes a front cover, a first housing and a second housing, the front cover and the first housing Enclosing a cavity with the second housing, the speaker unit is fixed in the cavity, the speaker unit separates the cavity into a front cavity and a rear cavity, the speaker unit and the speaker a cavity between the front cover and the first casing is a front cavity; the speaker unit includes a vibration system and a magnetic circuit system; and the front cover is provided with an empty space corresponding to the speaker installation position The cavity is isolated from the front cavity and the rear cavity; the cavity is provided with a gas permeable structure in communication with the external environment.
The speaker module according to claim 1, wherein said cavity has a volume of 0.1 cubic centimeters.
The speaker module according to claim 1, wherein said cavity area is smaller than said speaker unit vibration system area.
The speaker module according to claim 1, wherein the gas permeable structure is disposed on a side of the casing.
The speaker module according to claim 1 or 4, wherein the gas permeable structure is a gas permeable opening.
The speaker module according to claim 1, wherein the front cavity is provided with an sound hole, the sound hole communicates with the front cavity and an external environment, and the sound hole is disposed in the casing side.
A speaker module according to any one of claims 1, 2, 3, 4 or 6, wherein said magnetic circuit system comprises a magnetic yoke, and said second housing corresponds to said magnetic conductive The yoke position is provided with an opening, and the yoke extends out of the opening.